[Coin-discuss] how to get variable names in CPLEX LP format using OSI?

[Laszlo Ladanyi]

Hi Paul,

The bad news: as far as I know (but Francois may correct me) the LP format
reader loses the variable names... :-(

Sorry,
--Laci

On Thu, 20 Apr 2006, Pu Huang wrote:

> If someone uses OsiSolverInterface::readLp() to read a problem instance in 
> CPLEX LP format and subsequently solve the problem. How to extract the 
> variable names from the solutions?
> 
> ------------------------------------
> 
> si=OsiSolverInterface;
> si= new OsiClpSolverInterface; 
> si->readLp("t1.lp");
> 
> // solve the problem
> 
> int n=si->getNumcols();
> solution =si->getColsolution();
> for(int i=0;i<n, i++){
>            string name=si->?????? (what function to call?)
>         cout<<name<<" = "<<solution[i]<<endl;
> }
> -------------------------------------
> 
> I tried OsiSolverInterface::getColName(), but it returns names like 
> "C000001", not the original variable names in the LP file. 
> 
> Cheers
> Paul Huang